Chemtrac HydroAct 4, User Manual

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3.1 PC6 Particle Counter 47
There are up to 6, known as “bins”, with user selectable size ranges. Both the “To” and the “From”
values can be changed by selected the appropriate box. If “Composite” mode has been selected in
Advanced Setup only the Bin 1 “From” Value is configurable. Changes will not be applied unless the
“Save” button is pressed.
3.1.5.4 Modbus Setup
Modbus settings can be accessed by selecting:
Options → Setup → Modbus Setup
Slave Address Enter the Modbus slave address of the sensor. This is unlikely to change from 1.
Mode Select the Modbus serial mode. Options are “ASCII” or “RTU”.
Baud Rate Select the RS485 baud rate. Options are standard baud rates between 1200 and 115200.
Parity
Select the RS485 parity bit option. Options are “Odd”, “Even”, or “None”
Stop Bits
Select the number of stop bits. Options are 1 or 2.
Termination Enabled Use the checkbox to enable the use of a termination resistor.
Byte Swap To support different microprocessors that store data in different formats, the HydroAct 4
can alter the data it sends and receives to match the format expected by the sensor. The byte
swap option allows the order of bytes in the 16-bit registers to be reversed.
Word Swap When two 16-bit registers are combined for larger data types, e.g., floating-point number
representations, this option reverses the order of the two 16-bit words to match the format
expected by the sensor.
3.1.5.5 PPB Setup
Options
→
Setup
→
PPB Setup